BSTAT 2305 FINAL EXAMINATION TEST 2026 FULL QUESTIONS AND ACCURATE SOLUTIONS GRADED A+

BSTAT 2305 FINAL EXAMINATION TEST
2026 FULL QUESTIONS AND ACCURATE
SOLUTIONS GRADED A+

⩥ What is the mean? Answer: The arithmetic average.


⩥ Mean formula? Answer: Sum of values divided by n.


⩥ Is the mean resistant to outliers? Answer: No.


⩥ What is the median? Answer: Middle ranked value.


⩥ Median position formula? Answer: (n + 1)/2


⩥ Is median resistant to outliers? Answer: Yes.


⩥ What is the mode? Answer: Most frequent value.


⩥ Which center measure works for categorical data? Answer: Mode.


⩥ What is a measure of spread? Answer: A number describing
variability.

, ⩥ Range formula? Answer: Max − Min.


⩥ Are quartiles resistant to outliers? Answer: Yes.


⩥ What is Q2? Answer: The median.


⩥ IQR formula? Answer: Q3 − Q1


⩥ What does IQR represent? Answer: Middle 50% of data.


⩥ Variance measures what? Answer: Average squared deviation from
mean.


⩥ Standard deviation measures what? Answer: Average distance from
mean.


⩥ Relationship between variance and SD? Answer: SD = √variance.


⩥ Complement of event A? Answer: All outcomes not in A.


⩥ Complement rule? Answer: P(Aᶜ) = 1 − P(A)